Scraper for roller-mills.



PATENTED Nov 10, 1903.

G. F. THOMPSON. SGRAPER FOR ROLLER MILLS.

APPLICATION FILED APR. 23. 1903 NO MODEL.

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George F. Thdmpson G H01 m 44 s,

I UNIT D STATES Patented Novemberlo, 1903.

PATE T OFFICE.

AssIeNoR' TO NORDYKE & MARMON COMPANY, or

INDIAN APOLIS,

INDIANA, A CORPORATION OF INDIANA. Q

.SCRAPER FOR ROLLER-MILLS; I

I SPECIFICATION forming part of Letterslatent No. 743,955, dated November 10, 1903.

Application filed April 23, 1903.

Serial No. 153,953. (No model.)

of Philadelphia and State of Pennsylvania,

have invented certain new and useful Improvements in Scrapers for Roller-Mills, of"

which the following is a specification.

' being treated will be kept cleaned from the The object of my said invention is to pro does an easily-manipulated self adjusting scraper for roller-mills wherebythe material rolls.

A mill equipped with said invention will be first fully described and the novel features thereof then pointed out in the claims.

. scraper Referring to the accompanying drawings, which are made a part hereof, and on which similar reference characters indicate similar part-s, Figure 1- is a side elevation of so much of a roller-mill as is necessary to illustrate my invention, the inclosing casing being partially removed toshow the-interior; Fig. 2, a transverse vertical sectional view as seen when looking in the direction indicated by the arrows from the-dotted line 2 2 in Fig. 1; Fig. 3, a plan view of one of the scrapers; Fig. 4, a detail sectional view through the and its arm at the point indicated by the dotted line 4 Mn Fig. 3; and Fig. 5, a fragmentary-plan view as seen when looking in the direction indicated by the dotted lined 5 above Fig. 4, the upper parts being partially broken away toshow the construct-ion beneath.

The mill in itself may be of any ordinary or desired construction. In anappropriate framework 21 are mounted the grinding or reducing rolls 22. Extending longitudinally through thecasing of the mill are fulcrumrods 23. Y

The scraper is composed of a suitable body 24, embodying an arm 25, preferably'formed integrally, generally of cast-iron, and a-suitable blade 26, secured to said scraper-body and adapted in operation to bear against the surface of the rolls 22. Upon the edge of the scraper-bodyare two ribs or bearing-spots 27 and 28, and a third bearing or projection upper surface of the arm or a washer arm and its 29 is formed upon the under side of the arms These three points 27, 28, and 29 when the scraperis in position'bear upon the pivot-rod 23, which thus supports the scraper in place. The arm from each scraper extends to outside the machine, where it is bifurcated and engageswith a rod 30, suitably pivoted to the frame of ried by a bracket dl on a frame-bar 42) and extending upwardly and having a nut 31 upon its upper end; between which and the 32 rest- .ing thereon, is a spring .33. Obviously by tightening orloosening the nut greater or less pressure will be exerted upon the scraperblade will be held with more or less force against the corresponding roll of the machine, the rod 23 acting-as a fulcrum, over which the arm as a lever'will operate. The bifurcated and e ofthe arm permits the rod 30 to swing into and out of engagement therewith without removing the nut.

As will be readily understood, the single central bearing-support at the base of the arm enablesthe ends of the scraper to bear yieldingly against the surface of the roll, the ribs forming the other bearing-points being arranged substantially as at right angles with the direction of'force on the scraper, permitting said scraper to rock on its bearings, and thus adapt itself to the surface of the roll without difficulty.

The blade 26 is secured to the scraper-body 2 lby meansof a bar 34 and bolts 35, which passthrough holes in said bar, said blade, and said body 24. The holes in the blade are elongated somewhat, and it is therefore adjustable as may be desired. It is also easily removable for purposes of sharpening, repair, or replacement, as will be readily understood.

Having thus fully described my said invention, what i claim as new, and desire to secure by Letters Patent, is-

the machine (it is shown as car-' 1. The combination with the rolls of a mill,

said arm, substantially as set forth.

k 2. The combination, in a scraper for mills, I the scraper against downward force, and the of the body 24, the arm 25, the bearing-points 27 28 and. 29, a suitable fulcrum-rod upon which the same is mounted and upon which said bearing-points rest, and a yielding atiaehment for said scraper.

3. The combination with aroll of a grinding-mill, of a, scraper, a fulcrum-rod whereon said scraper is mounted, and three hearingpoints on the scraper structure which come in contact with said rods, one of said bearingpoints being centrally disposed to support others being disposed on each side of she central point and arranged to support: the scraper against backward thrust.

In witness whereof I have hereunto set my hand and seal, at Philade]phi a,Pennsylvania, this 18th day of April, A-D. 1903.

GEORGE FREDERICK THOMPSON. [14.5.]

Witnesses:

J. S. COOHRAN, VALENTINE J HUEGLE. 

